Even with Cortana and searching the Web from the Start menu disabled, opening Start and typing will send a request to www.bing.com to request a file called threshold.appcache which appears to contain some Cortana information, even though Cortana is disabled. The request for this file appears to contain a random machine ID that persists across reboots.

"Windows 10 uses the Internet a lot to support many of its features.The operating system also sports numerous knobs to twiddle that are supposed to disable most of these features,and the potentially privacy-compromising connections that go with them.

Unfortunately for privacy advocates, these controls don't appear to be sufficient to completely prevent the operating system from going online,and communicating with Microsoft's servers.

For example, even with Cortana and searching the Web from the Start menu disabled,opening Start and typing will send a request to www.bing.com to request a file called threshold.appcache,which appears to contain some Cortana information, even though Cortana is disabled.The request for this file appears to contain a random machine ID that persists across reboots."

Seeing the bunch of incomplete or broken scripts to disable tracking in Windows 10, and the tools that install adware or worse in exchange for their function, we wrapped disabling tracking up in a small tool that's free and clean."Spybot Anti-Beacon for Windows 10": https://dl.dropboxusercontent.com/u/85556593/SDCutTheLine.exe

Thanks Corrine & techie @ Corrine Spybot Anti-Beacon for Windows 10 is good tool that also works well,The only issue I would have with is it writes to the hosts file which some users might not like.but it works.